Apparatus

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sensors Mode-S transponder

781C9E

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-326S · AIRBUS A-321neo

Hex
781C9E
Octal
36016236
Decimal
7,871,646
Country
CN
Tail
B-326S
Type
A21N
No current signal · last broadcast 1h ago
Flights observed
91
Distinct callsigns
18
Country
CN
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 781C9E.

Country allocation

The ICAO 24-bit address 781C9E falls within the block assigned to China (CN) by ICAO Annex 10, Volume III. Every aircraft registered in China receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 18 distinct

Callsign Airline Flights Last seen
CDC8630 - 15 2026-07-13
CDC8787 - 14 2026-07-05
CDC8737 - 14 2026-07-05
CDC8629 - 9 2026-07-14
CDC8738 - 8 2026-06-24
CDC8206 - 7 2026-07-05
CDC8788 - 5 2026-07-07
CDC8888 - 4 2026-06-23
CDC8989 Zhejiang Loong Airlines 2 2026-05-15
CDC8988 Zhejiang Loong Airlines 2 2026-06-23
CDC8231 Zhejiang Loong Airlines 2 2026-06-17
CDC8966 Zhejiang Loong Airlines 1 2026-06-07
CDC8965 Zhejiang Loong Airlines 1 2026-06-07
CDC8859 Zhejiang Loong Airlines 1 2026-05-29
CDC8700 Zhejiang Loong Airlines 1 2026-05-24
CDC8285 - 1 2026-07-01
CDC8008 - 1 2026-06-25
CDC8007 - 1 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CDC8629 - Jul 14, 07:15 UTCJul 14, 07:25 UTC10m
2026-07-13 CDC8630 - Jul 13, 09:00 UTCJul 13, 09:15 UTC15m
2026-07-13 CDC8629 - Jul 13, 07:30 UTCJul 13, 07:40 UTC10m
2026-07-12 CDC8630 - Jul 12, 09:00 UTCJul 12, 09:15 UTC15m
2026-07-11 CDC8630 - Jul 11, 09:05 UTCJul 11, 09:15 UTC10m
2026-07-11 CDC8629 - Jul 11, 06:45 UTCJul 11, 07:10 UTC25m
2026-07-10 CDC8630 - Jul 10, 09:50 UTCJul 10, 10:00 UTC10m
2026-07-09 CDC8630 - Jul 9, 11:20 UTCJul 9, 11:35 UTC15m
2026-07-09 CDC8629 - Jul 9, 09:15 UTCJul 9, 09:30 UTC15m
2026-07-08 CDC8630 - Jul 8, 10:05 UTCJul 8, 10:15 UTC10m
2026-07-08 CDC8629 - Jul 8, 08:15 UTCJul 8, 08:25 UTC10m
2026-07-07 CDC8630 - Jul 7, 17:45 UTCJul 7, 18:00 UTC15m
2026-07-07 CDC8788 - Jul 7, 15:40 UTCJul 7, 15:55 UTC15m
2026-07-05 CDC8206 - Jul 5, 12:10 UTCJul 5, 17:55 UTC5h 45m
2026-07-05 CDC8787 - Jul 5, 04:55 UTCJul 5, 05:05 UTC10m
2026-07-05 CDC8737 - Jul 5, 03:25 UTCJul 5, 03:35 UTC10m
2026-07-03 CDC8206 - Jul 3, 13:35 UTCJul 4, 08:05 UTC18h 30m
2026-07-03 CDC8787 - Jul 3, 04:25 UTCJul 3, 04:35 UTC10m
2026-07-03 CDC8737 - Jul 3, 02:50 UTCJul 3, 03:10 UTC20m
2026-07-01 CDC8285 - Jul 1, 15:55 UTCJul 1, 16:05 UTC10m
2026-06-30 CDC8787 - Jun 30, 05:15 UTCJun 30, 05:25 UTC10m
2026-06-30 CDC8737 - Jun 30, 02:50 UTCJun 30, 03:10 UTC20m
2026-06-25 CDC8008 - Jun 25, 06:20 UTCJun 25, 07:09 UTC50m
2026-06-25 CDC8007 - Jun 25, 04:04 UTCJun 25, 04:20 UTC15m
2026-06-24 CDC8738 - Jun 24, 15:39 UTCJun 24, 15:49 UTC10m
2026-06-24 CDC8788 - Jun 24, 12:40 UTCJun 24, 12:50 UTC10m
2026-06-23 CDC8988 PEK → HGH Jun 23, 12:35 UTCJun 23, 12:45 UTC10m
2026-06-23 CDC8888 - Jun 23, 03:00 UTCJun 23, 03:09 UTC10m
2026-06-22 CDC8206 - Jun 22, 12:25 UTCJun 22, 13:05 UTC40m
2026-06-22 CDC8787 - Jun 22, 04:34 UTCJun 22, 04:44 UTC10m
2026-06-22 CDC8737 - Jun 22, 02:14 UTCJun 22, 02:59 UTC45m
2026-06-20 - - Jun 20, 07:29 UTCJun 20, 15:34 UTC8h 5m
2026-06-17 CDC8231 HRB → HGH Jun 17, 23:40 UTCJun 18, 17:15 UTC17h 35m
2026-06-17 CDC8630 - Jun 17, 10:25 UTCJun 17, 10:35 UTC10m
2026-06-17 CDC8629 - Jun 17, 07:10 UTCJun 17, 07:25 UTC15m
2026-06-16 CDC8630 - Jun 16, 12:05 UTCJun 16, 12:14 UTC10m
2026-06-16 CDC8629 - Jun 16, 10:20 UTCJun 16, 10:40 UTC20m
2026-06-15 CDC8630 - Jun 15, 13:54 UTCJun 15, 14:05 UTC10m
2026-06-14 CDC8630 - Jun 14, 09:10 UTCJun 14, 09:20 UTC10m
2026-06-13 CDC8630 - Jun 13, 10:05 UTCJun 13, 10:15 UTC10m
2026-06-13 CDC8629 - Jun 13, 07:40 UTCJun 13, 08:00 UTC20m
2026-06-12 CDC8630 - Jun 12, 10:30 UTCJun 12, 10:40 UTC10m
2026-06-12 CDC8629 - Jun 12, 07:50 UTCJun 12, 08:00 UTC10m
2026-06-11 CDC8630 - Jun 11, 09:10 UTCJun 11, 09:20 UTC10m
2026-06-10 CDC8630 - Jun 10, 09:05 UTCJun 10, 09:20 UTC15m
2026-06-09 CDC8231 HRB → HGH Jun 9, 04:45 UTCJun 9, 08:45 UTC4h 0m
2026-06-08 CDC8888 PEK → HGH Jun 8, 03:00 UTCJun 8, 03:10 UTC10m
2026-06-07 CDC8966 SZX → HGH Jun 7, 07:35 UTCJun 7, 07:45 UTC10m
2026-06-07 CDC8965 HGH → SZX Jun 7, 04:10 UTCJun 7, 04:25 UTC15m
2026-06-06 CDC8738 SZX → HGH Jun 6, 17:24 UTCJun 6, 17:34 UTC10m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the B-326S page for operator, model, and routing details .

Mode-S 781C9E frequently asked

What is Mode-S code 781C9E?
781C9E is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-326S.
Where is Mode-S 781C9E registered?
Mode-S code 781C9E is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781C9E broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781C9E, octal 36016236, decimal 7,871,646.
What flights does 781C9E operate?
Mode-S 781C9E has broadcast 18 distinct callsigns, including CDC8630, CDC8787, CDC8737, CDC8629, CDC8738.